Anchoring plug for walls



May 22, 1951 A. J. vALLuzzl 2553,61'4

ANCHORING PLUG FR WALLS Filed Jan. 14, 1949 ATroRA/EVL Patented May 22,1951 UNITED STATES TENT OFFICE 2,553,614 ANononiNG PLUG Fon WALLS ArthurJ. Valluzzi, Fort Riley, Kans.

Application January 14, 1949, Serial No. 70,875

(Cl. IE5-2.4)

1 claim.

This invention relates to an anchoring plug adapted to be embedded invarious types of walls for supporting articles.

An object of the invention is the provision oi a plug stamped from twopieces of metal to form a sheath for the reception of a hre core,portions of the sheath having a series of key hole slots through whichportions of the nbre core are forced when a wood screw in driven intothe core for attaching a support to a wall, a pocket having been drilledprevioinsly into the wall for the reception of the sheath.

A further object of the invention is the provision of a plug having thebody thereof stamped from a single piece of metal to form a bottom and apair of curved side walls rising integrally from the bottom thereof withkey hole slots arranged transversely in said walls, portions of a coreof brous materials being forced through said slots while expanding theside walls when a screw is driven into the core, the outer free ends ofthe side walls being connected together in spaced relation by a flangedcap having a central perforation through which the screw is driven forsupporting a bracket or hook, the metal plug being received within apocket drilled into a wall of a building. The screw may secure anarticle directly to the wall.

The invention is best understood from a consideration of the followingdetailed description in connection with the accompanying drawings,nevertheless, it is to be borne in mind that the invention is not connedto the disclosure but is susceptible of such changes and modications asshall deiine no material departure from the salient features of theinvention as expressed in the appended claim.

In the drawings:

Figure l is a longitudinal vertical section of my anchoring plug shownin position ina pocket formed in the plaster of a wall,

Figure 2 is a longitudinal side view of the plug in an inoperativeposition,

Figure 3 is a transverse vertical section taken along the line 3 3 ofFigure 2,

Figure 4 is a plan view of a metal blank from which a sheath of the plugis manufactured, and

Figure 5 is an enlarged longitudinal side view of a core formed ofiibrous materials which is adapted to be inserted into the metal sheath.

Referring more particularly to the drawings I l) designates a section ofa wall of a building. The wall may be formed of plaster of the typecommonly employed for the purpose or the walls may be constructed ofconcrete or any well known 2 material. A pocket Il is drilled into thewall to a predetermined depth to provide an inner closed end i2 whichwill act as a barrier to ants or other insects.y

A metal sheath I5. is pressed into shape from a blank It illustrated inFigure 4. This blank consists principally of a central member I I fromwhich extend flat metal strips I3 having the same width as the diameterof said central member. Hor-fever, during the stamping process, thestrips i8 are pressed into the form of transversely curved side walls 2Bof the sheath while the said walls are bent upwardly along the dottedlines 2 l. The member il forms the bottom wall of the sheath. Openings22 which are modiiied forms of key-hole slots are ont through the metalstrips I8. These openings include a circular passage 25 anddiametrically disposed slots 26 projecting from the circular passage.During manufacture, the bottom is stamped to form a recessed base forthe ber.

A cap 3B is circular and has an annular inturned ange 3| pinched ontothe out-turned anges 32 on the outer free ends of the transverselycurved side walls 20 of the sheath I5. The center of the cap is indentedas shown at 35 and is provided with a passage 35 to receive a wood screw3l. A length of brous material 38 (Fig. 5) forming a core or ller isplaced in the sheath I5. A bracket, hook or other attaching means 4I) issecured to the plug by the head of the Screw. It must be borne in mindthat many articles may be secured by the head of the screw 31 directlyto the plug without the use of brackets or hooks.

The filler or core 38 is composed of three or more strands of brousmaterials, such as paper. Each strand consists of a thin narrow strip ofpaper which is rolled or twisted. The strands are then coiled as shown.

The pocket II (Fig. 1) is drilled into the wall which may be formed notonly of plaster or cement but may be formed of plaster board or tile. Asshown, the pocket terminates short of the rear face of said wall. Thecomplete unit shown in Figure 2 is pressed into .the pocket by the thumbof the operator. The filler 38 housed within the sheath I5 is compressedin the inner end thereof by hammering the screw I1 into the nller fornot only compressing said nller in the inner end of the sheath but forcausing the iiller to expand its side walls of the sheath against thewalls of the pocket. The sheath is formed of aluminum so that it willexpand readily. The screw is withdrawn.

At this time, the inturned ange 3| on the cap 3% is in flat Contact Withthe front face of the wall l0. An opening in the bracket im, hook, orarticle which is adapted to be attached to the wall is alined with theopening 3l in the cap 3Q and the screw is inserted through said alinedopenings. A screw driver is employed for forcing the screw into thecompacted ller 38. The modied form of key-hole slots 22 permits thefibrous materials to come into frictiona-l Contact with walls of thepocket Il while bending or stretching to some extent the transverselycurved walls 2U of the sheath l5 so that said Walls will be expandedmore readily against the walls of the pocket H. While the metal fromwhich the blank I6 and cap 3|! are stamped is preferably aluminum, orsome other soft or malleable metals, copper or brass may he employed.

When it is desired toremove the plug from the pocket, the screw 3'! iswithdrawn and the cap 3i! is removed by any suitable instrument. screwis returned and screwed into the ller or iibrous core 38. A claw hammeror pliers are employed in pulling out the screw and core. The plierswill be used to withdraw the sheath i5.

It will be noted that the inner end of the sheath is expanded againstthe inner portions of the walls of the pocket. In this manner, there isno danger of cracking or chipping the outer surface of the Wall lll.This is particularly true when the pocket has been drilled into a tileor other l fragile or brittle material which may chip Where the pressureis exerted near the surface thereof. The plugs as will be appreciatedmay be used a number of times.

What I claim:

An expansion plug for a pocket in a Wall comprising a sheath formed froman elongated blank The of soft metal and including a pair oftransversely curved side walls connected together at the inner endsthereof by a bottom portion and having radially outwardly directedianges at their outer ends, a fibrous filler in the inner end of thesheath, said iiller comprising several strands of fibrous material, thestrands being twisted together to form a solid unit, a disc having anannular inwardly directed ange at its outer odge and an aperture at itscenter, said ange of said disc engaging said outwardly directed flangeson the outer ends of said side walls and serving as a cap membertherefor, and a screw inserted through said aperture and threaded intothe filler to expand the iiller and thereby expand the side walls of thesheath against the walls of the pocket, the side walls of the sheathbeing provided with a plurality of key hole slots to acilitate theexpansion of said side walls and to allow portions of said filler tofrictionally engage the wai-ls of the pocket.

ARTHUR J. VALLUZZI.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 1,524,570 Rawlings Jan. 27, 19251,5%,736 Krause July 21, 1925 FOREIGN PATENTS Number Country Date697,676 France Jan. 21, 1931 699,620 Germany Apr. 18, 1941

